Nonprofits in Connecticut

Nonprofits in Connecticut. Browse 26,993 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.

Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.

Nonprofit profiles

  1. Independent Order of Odd Fellows

    EIN 237141366 · Headquarters: NAUGATUCK, CT, US · Mutual & Membership Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  2. Independent Order of Odd Fellows

    EIN 237596765 · Headquarters: Colchester, CT, US · Mutual & Membership Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  3. Independent Order of Odd Fellows

    EIN 352454547 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Independent Order of Odd Fellows

    EIN 510145615 · Headquarters: Stratford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  5. Independent Order of Odd Fellows

    EIN 911827998 · Headquarters: NAUGATUCK, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  6. Independent Order of Odd Fellows

    EIN 911971715 · Headquarters: new milford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  7. Independent Order of Odd Fellows Ct Grand Lodge

    EIN 060622547 · Headquarters: WATERBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Independent Womens Traumatic Brain Injury Charity

    EIN 453658600 · Headquarters: New Canaan, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. India 600

    EIN 811783121 · Headquarters: Monroe, CT, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  10. India Arts Foundation

    EIN 475360237 · Headquarters: South Windsor, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. India Association of Central Connecticut Inc

    EIN 462891593 · Headquarters: ROCKY HILL, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990

  12. India Association of Greater Hartford Inc

    EIN 510139599 · Headquarters: ROCKY HILL, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ

  13. India Collective Inc

    EIN 863921418 · Headquarters: Southport, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990

  14. India Cultural Center of Greenwich Inc

    EIN 461158798 · Headquarters: RIVERSIDE, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. India Heritage Center Inc

    EIN 922004803 · Headquarters: STAMFORD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  16. Indian & Colonial Research Center Inc

    EIN 066083774 · Headquarters: Old Mystic, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  17. Indian American Package Stores Asso

    EIN 874301587 · Headquarters: NORTH HAVEN, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Indian Association of Western Ct Inc

    EIN 271187832 · Headquarters: DANBURY, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  19. Indian Child Development Project Inc

    EIN 472612525 · Headquarters: riverside, CT, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  20. Indian Fields Homeowners Association

    EIN 061052900 · Headquarters: Brookfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Indian Harbor Sailing Foundation Inc

    EIN 100001598 · Headquarters: Stamford, CT, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Indian Harbor Yacht Club Foundation Inc

    EIN 273193524 · Headquarters: GREENWICH, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990

  23. Indian Hill Cemetery Association

    EIN 060351715 · Headquarters: MIDDLETOWN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Indian Hill Country Club Inc

    EIN 060852220 · Headquarters: NEWINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Indian Lake Association of Connecticut and New York

    EIN 061113398 · Headquarters: SHARON, CT, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Indian Meadow Estate Inc

    EIN 060728654 · Headquarters: WINSTED, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  27. Indian Motorcycle Riders Group of Brookfield Inc

    EIN 821305232 · Headquarters: BROOKFIELD, CT, US · Public & Societal Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  28. Indian Mountain School Inc

    EIN 060646681 · Headquarters: LAKEVILLE, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Indian Neck Yacht Club Inc

    EIN 060883429 · Headquarters: Branford, CT, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990

  30. Indie Sellers Guild

    EIN 882907366 · Headquarters: Quaker Hill, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Indie Sellers Guild Foundation

    EIN 921100921 · Headquarters: Quaker Hill, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Indigenous Cultural Education Center Inc

    EIN 262373150 · Headquarters: Lebanon, CT, US · Arts, Culture & Humanities · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  33. Indivisible Greenwich Inc

    EIN 822097820 · Headquarters: Greenwich, CT, US · Public & Societal Benefit · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  34. Indochina Starfish Foundation - Us Inc

    EIN 994529173 · Headquarters: NEW CANAAN, CT, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990

  35. Industrial Workers of the World

    EIN 831570342 · Headquarters: New London, CT, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Industry for Middletown Inc

    EIN 060874781 · Headquarters: Middletown, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  37. Inextricably Bound Community Development Corporation

    EIN 464239478 · Headquarters: HAMDEN, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Infection Control Nurses of Connecticut

    EIN 061331555 · Headquarters: HAMDEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  39. Infectious Diseases Society of New York Inc

    EIN 133734533 · Headquarters: Old Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Infinite Horizons Clubhouse Inc

    EIN 823964529 · Headquarters: West Hartford, CT, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Infinite Possibilities Ct

    EIN 922464668 · Headquarters: New London, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  42. Infinite Possibilities Inc

    EIN 834692178 · Headquarters: Monroe, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Infinite Strength Inc

    EIN 824118676 · Headquarters: MADISON, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990

  44. Infinity Baseball Club Inc C/o Ryan Brown

    EIN 873605236 · Headquarters: Collinsville, CT, US · Recreation & Sports · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  45. Information Systems Audit and Control Association Inc

    EIN 363538336 · Headquarters: Simsbury, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  46. Informing Democracy

    EIN 883181615 · Headquarters: GROTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Informing Democracy Education Fund

    EIN 931670340 · Headquarters: GROTON, CT, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Infragard National Members Alliance Inc

    EIN 050623911 · Headquarters: New Haven, CT, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Infused Impact Inc

    EIN 843362785 · Headquarters: ORANGE, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990

  50. Infusion Nurses Society Inc

    EIN 061337788 · Headquarters: Darien, CT, US · Health Care · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  51. Inger Foundation Inc

    EIN 020711433 · Headquarters: GREENWICH, CT, USA · Medical Research · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ

  52. Ingovation Inc

    EIN 300846491 · Headquarters: BETHLEHEM, CT, US · International, Foreign Affairs & National Security · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  53. Inner Agape Light Ministry Inc

    EIN 393056548 · Headquarters: Fairfield, CT, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Inner City Outreach Andor Jesus Love Inc

    EIN 061435866 · Headquarters: Bloomfield, CT, US · Crime & Legal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Inner Room Inc

    EIN 452739028 · Headquarters: Madison, CT, US · Human Services · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  56. Inner Sound Habitats

    EIN 933937530 · Headquarters: West Hartford, CT, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Inner Vision Group Inc

    EIN 920732461 · Headquarters: WESTON, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Innovative Advanced Cancer Research Foundation Inc

    EIN 455251879 · Headquarters: Washington Depot, CT, US · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. Innovative Children's Environmental Services Inc

    EIN 061564061 · Headquarters: NAUGATUCK, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Inside Animal Ag

    EIN 874227285 · Headquarters: Redding, CT, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Insights Association North Atlantic Chapter Inc

    EIN 042980007 · Headquarters: Stamford, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  62. Insights for Rehabilitation Inc

    EIN 223889010 · Headquarters: Guilford, CT, US · Health Care · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  63. Inspired by Her Inc

    EIN 830892357 · Headquarters: Bloomfield, CT, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Inspired Communities Inc

    EIN 842633563 · Headquarters: New Haven, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Inspired Harmony Inc

    EIN 831379607 · Headquarters: Hamden, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Inspireinc

    EIN 474207856 · Headquarters: Fairfield, CT, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Inspirica Inc

    EIN 061172535 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Inspiring Youth and Mentors

    EIN 873146225 · Headquarters: NORWICH, CT, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Institches Me & U

    EIN 932167427 · Headquarters: Bridgeport, CT, USA · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  70. Institute for American Ideals Inc

    EIN 811063093 · Headquarters: GREENWICH, CT, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Institute for Better Communities

    EIN 474386355 · Headquarters: Norwalk, CT, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  72. Institute for Classics Education Inc

    EIN 861589888 · Headquarters: Westport, CT, US · Arts, Culture & Humanities · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  73. Institute for Collaborative Workplaces Inc

    EIN 474580143 · Headquarters: Stamford, CT, US · Employment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  74. Institute for Community Research Inc

    EIN 060653116 · Headquarters: HARTFORD, CT, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990

  75. Institute for Cross Cultural Awareness and Transformative Educa

    EIN 862984701 · Headquarters: Bloomfield, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Institute for Educational Innovationinc

    EIN 223174632 · Headquarters: NEW HAVEN, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  77. Institute for Ethics and Emerging Technologies Inc

    EIN 510527636 · Headquarters: Willington, CT, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  78. Institute for Healthcare Communication

    EIN 223208010 · Headquarters: Danbury, CT, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  79. Institute for Human Rights & Protec Tion Corporate

    EIN 414898073 · Headquarters: Hamden, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Institute for Learning in Retirement of Greater New Haven Inc

    EIN 260099516 · Headquarters: ORANGE, CT, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  81. Institute for Life Coping Skills Incorporated

    EIN 237417955 · Headquarters: Greenwich, CT, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Institute for Life Sciences Collaboration Inc

    EIN 455595804 · Headquarters: MADISON, CT, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990

  83. Institute for Long Term Care Policy Inc

    EIN 061391583 · Headquarters: WALLINGFORD, CT, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Institute for Neurodegenerative Disorders

    EIN 061582206 · Headquarters: NEW HAVEN, CT, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. Institute for Ocean Studies

    EIN 061515982 · Headquarters: NORTH HAVEN, CT, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  86. Institute for Problem Gambling Inc

    EIN 061482312 · Headquarters: Middletown, CT, US · Mental Health & Crisis Intervention · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  87. Institute for Professional Education Inc

    EIN 263341604 · Headquarters: WESTPORT, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Institute for Research & Advancement in Public Services Inc

    EIN 061246767 · Headquarters: SHELTON, CT, USA · Public & Societal Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990-PF

  89. Institute for Retirement Security

    EIN 562483010 · Headquarters: Glastonbury, CT, US · Housing & Shelter · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  90. Institute for Senior Living Education Inc

    EIN 453483700 · Headquarters: Old Lyme, CT, US · Housing & Shelter · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  91. Institute for Studies Ineducational Mathematics

    EIN 411387197 · Headquarters: North Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Institute for Supply Management Connecticut Inc

    EIN 060661092 · Headquarters: BRANFORD, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  93. Institute for Young Journalists Inc

    EIN 061559706 · Headquarters: Greenwich, CT, US · Education · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  94. Institute of Allied Medical Professions

    EIN 132928042 · Headquarters: STAMFORD, CT, USA · Education · Latest available filing year: 2013 · Primary form: IRS Form 990

  95. Institute of Development and Education for Africa Inc

    EIN 010764202 · Headquarters: hamden, CT, US · International, Foreign Affairs & National Security · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  96. Institute of Industrial Engineers Inc

    EIN 066061884 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Institute of Internal Auditors

    EIN 237300273 · Headquarters: Broad Brook, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Institute of Internal Auditors

    EIN 620976511 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Institute of Internal Medicine Research

    EIN 208105306 · Headquarters: BLOOMFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  100. Institute of Living

    EIN 060646683 · Headquarters: Hartford, CT, US · Mental Health & Crisis Intervention · Latest available filing year: 2014 · Primary form: IRS Form 990

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